CI - restore build caching during release step of CI pipeline

[wise-king-sullyman]

During a prior temporary fix I had to remove a caching step from our CI pipeline, that step should now be restored to help keep our CI as fast as possible.

The change needed is shown below, it should be inserted before the build dist step of the release.yml file.

- uses: actions/cache@v2
        id: dist
        name: Cache dist
        with:
          path: |
            packages/*/dist
            packages/*/next
            packages/*/deprecated
            packages/*/components
            packages/react-styles/css
            packages/react-core/layouts
            packages/react-core/helpers
          key: ${{ runner.os }}-dist-14-${{ secrets.CACHE_VERSION }}-${{ hashFiles('yarn.lock', 'package.json', 'packages/*/*', '!packages/*/dist', '!packages/*/node_modules') }}